TY - GEN
T1 - Fracture energy measurements of biodegradable pol(lactic acid)
AU - Arakawa, Kazuo
AU - Mada, Toshio
AU - Park, Sang Dae
AU - Todo, Mitsugu
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Stable and dynamic fracture behavior of PLA was studied using single-edge-notch-tensile specimens. To examine kinetic effect, the specimen was pin-loaded with a special fixture so that it could split and fly away after the fracture. Nonelastic effect or viscoplastic deformation was also measured using an optical high speed extensometer. For the stable and dynamic process, external work applied to the specimen and its fracture surface were partitioned into Us and Ud, and As and Ad, respectively. Energy release rate Gs for the stable crack growth was determined by Us/As. The kinetic and nonelastic energies were measured and subtracted from Ud to evaluate fracture energy Ef for the dynamic process. Energy release rate Gf was then determined by Ef/Ad. The values of Gd (=Ud/Ad) were also obtained to correlate with G s and Gf, and the results were discussed.
AB - Stable and dynamic fracture behavior of PLA was studied using single-edge-notch-tensile specimens. To examine kinetic effect, the specimen was pin-loaded with a special fixture so that it could split and fly away after the fracture. Nonelastic effect or viscoplastic deformation was also measured using an optical high speed extensometer. For the stable and dynamic process, external work applied to the specimen and its fracture surface were partitioned into Us and Ud, and As and Ad, respectively. Energy release rate Gs for the stable crack growth was determined by Us/As. The kinetic and nonelastic energies were measured and subtracted from Ud to evaluate fracture energy Ef for the dynamic process. Energy release rate Gf was then determined by Ef/Ad. The values of Gd (=Ud/Ad) were also obtained to correlate with G s and Gf, and the results were discussed.
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M3 - Conference contribution
AN - SCOPUS:32144439966
SN - 0912053909
T3 - Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
SP - 1845
EP - 1850
BT - Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
T2 - 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
Y2 - 7 June 2005 through 9 June 2005
ER -